/*
 * Copyright (C) 2008 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free 
 * Software Foundation, either version 3 of the License, or (at your option) 
 * any later version. 
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.peer.controller;

import org.ourgrid.common.interfaces.RemoteWorkerProvider;
import org.ourgrid.common.interfaces.management.RemoteWorkerManagement;
import org.ourgrid.common.interfaces.to.LocalWorkerState;
import org.ourgrid.common.statistics.control.WorkerControl;
import org.ourgrid.peer.controller.messages.WorkerMessages;
import org.ourgrid.peer.dao.AllocationDAO;
import org.ourgrid.peer.to.RemoteAllocableWorker;
import org.ourgrid.peer.to.Request;
import org.ourgrid.reqtrace.Req;

import br.edu.ufcg.lsd.commune.api.FailureNotification;
import br.edu.ufcg.lsd.commune.api.InvokeOnDeploy;
import br.edu.ufcg.lsd.commune.api.RecoveryNotification;
import br.edu.ufcg.lsd.commune.container.servicemanager.ServiceManager;
import br.edu.ufcg.lsd.commune.identification.DeploymentID;

/**
 * Implement Peer actions when a remote worker fail.
 */
public class RemoteWorkerFailureController  {

	private ServiceManager serviceManager;

	@InvokeOnDeploy
	public void init(ServiceManager serviceManager) {
		this.serviceManager = serviceManager;
	}

	@RecoveryNotification
	public void doNotifyRecovery(RemoteWorkerManagement failedWorker, DeploymentID remoteWorkerID) {}

	/**
	 * Notifies that a remote worker has failed
	 */
	@Req("REQ114")
	@FailureNotification
	public void doNotifyFailure(RemoteWorkerManagement failedWorker, DeploymentID remoteWorkerID) {
		
		RemoteAllocableWorker remoteAllocableWorker = 
			serviceManager.getDAO(AllocationDAO.class).removeRemoteAllocableWorker(remoteWorkerID.getPublicKey());
		
		if (remoteAllocableWorker == null) {
			serviceManager.getLog().debug(WorkerMessages.getUnknownRemoteWorkerFailureMessage(remoteWorkerID));
			return;
		}
		
		if (remoteAllocableWorker.isDelivered()) {
			serviceManager.getLog().debug(WorkerMessages.getAlreadyDeliveredRemoteWorkerFailureMessage(remoteWorkerID));
			return;
		}
		
		serviceManager.getLog().debug(WorkerMessages.getRemoteWorkerFailureMessage(remoteWorkerID));
		
		RemoteWorkerProvider rwp = (RemoteWorkerProvider) remoteAllocableWorker.getWorkerProvider();
		
		DeploymentID stubDeploymentID = serviceManager.getStubDeploymentID(rwp);
		boolean providerIsUp = stubDeploymentID != null;

		if (providerIsUp) {
			rwp.disposeWorker(remoteAllocableWorker.getServiceID());
		}
		
		Request request = remoteAllocableWorker.getRequest();
		
		if (request != null) {
			request.removeAllocableWorker(remoteAllocableWorker);
		}

		WorkerControl.getInstance().removeRemoteWorker(remoteWorkerID.getServiceID(), serviceManager);
		
		serviceManager.release(failedWorker);
	}

}
